Method and Device for Modulating Image Display Quality of Display Device Among Different Gray Levels

1. A method for modulating image display quality, comprising the following steps: setting a display device to a modulation state, which comprises: aging the display device for a preset period of time; modulating an image flicker of the display device into a predetermined value; acquiring a first display parameter of the display device, and constructing a first gamma curve based on the first display parameter; adjusting the first display parameter of the display device to a second display parameter until a gamma value of a second gamma curve of the display device corresponding to the second display parameter is within a predetermined range; and setting a first common voltage to be a first value; and modulating a second common voltage into a second value, wherein the first common voltage is a common voltage of the display device corresponding to a predetermined gray level, the second common voltage is a common voltage of the display device corresponding to a controllable gray level other than the predetermined gray level, and the first value is equal to the second value, wherein the first display parameter and the second display parameter are gamut or brightness, and the step of modulating the second common voltage into the second value comprises: acquiring the second common voltage; and adjusting the second common voltage upward when the second common voltage is smaller than the second value, or adjusting the second common voltage downward when the second common voltage is greater than the second value.

2. The method according to claim 1 , wherein the predetermined value is a minimal value.

3. The method according to claim 1 , wherein the predetermined range is between 2.0 and 2.4.

4. The method according to claim 1 , wherein subsequent to the step of modulating the second common voltage into the second value, the method further comprises: constructing a third gamma curve based on a third display parameter of the modulated display device; and storing the third display parameter when a gamma value of the third gamma curve meets a preset requirement.

5. The method according to claim 1 , wherein the predetermined gray level is gray level 127.

6. The method according to claim 1 , wherein the controllable gray level comprises at least one of gray level 0, gray level 1, gray level 64, gray level 191, gray level 254 and gray level 255.